Research Centre for Soil & Water Resources and Natural Disaster Prevention (SWAN), National Yunlin University of Science & Technology, Douliou, Taiwan, ROC.
Department and Graduate School of Safety and Environment Engineering, National Yunlin University of Science & Technology, Douliou, Taiwan, ROC.
Int J Phytoremediation. 2020;22(3):267-278. doi: 10.1080/15226514.2019.1658709. Epub 2019 Aug 29.
The removal of Reactive Black 5 (RB5) using chemically modified banana peel powder (CMBPP) from aqueous solution was dealt with in the present investigation. Factors affecting the adsorption of RB5 (like pH solution, agitation speed, initial concentration of RB5, contact time and temperature) were investigated. FTIR, SEM-EDX, BET and Elemental analysis characterized the adsorbent material. Adsorption kinetic results evaluated by non-linear pseudo-second-order model was fitted well and showed good correlation with the experimental data than the pseudo-first-order model. The experimental equilibrium data evaluated by non-linear Langmuir, Freundlich, Dubinin-Radushkevich (D-R), and Temkin equations and the experimental data were well described by the Langmuir isotherm model. Langmuir monolayer sorption capacity of RB5 onto CMBPP was observed at pH 3.0 (211.8 mg/g). The values of thermodynamic parameters revealed that the sorption process was feasible, spontaneous, endothermic, and physisorption in nature, (Δ <0, Δ > 0, and Δ > 0). Desorption studies reveal that the maximum recovery of RB5 when 0.1 M NaOH solution used as a desorbent. The CMBPP also exhibited excellent regeneration efficiency for the five cycles of successive adsorption-desorption. The results exposed that CMBPP could use as a prospective adsorbent material for the removal of RB5 from aqueous media.
本研究探讨了用化学改性香蕉皮粉（CMBPP）从水溶液中去除活性黑 5（RB5）。考察了影响 RB5 吸附的因素（如溶液 pH、搅拌速度、RB5 的初始浓度、接触时间和温度）。FTIR、SEM-EDX、BET 和元素分析对吸附剂材料进行了表征。通过非线性拟二级动力学模型评估的吸附动力学结果拟合良好，与实验数据的相关性优于拟一级动力学模型。通过非线性 Langmuir、Freundlich、Dubinin-Radushkevich（D-R）和 Temkin 方程以及实验数据评估的实验平衡数据，Langmuir 等温线模型对 RB5 吸附到 CMBPP 的实验数据进行了很好的描述。在 pH 3.0 时观察到 RB5 在 CMBPP 上的单层吸附容量为 211.8mg/g。热力学参数的值表明，吸附过程是可行的、自发的、吸热的和物理吸附的（Δ <0、Δ > 0 和 Δ > 0）。解吸研究表明，当使用 0.1 M NaOH 溶液作为解吸剂时，可以最大程度地回收 RB5。CMBPP 在连续吸附-解吸的五个循环中也表现出出色的再生效率。结果表明，CMBPP 可以用作从水介质中去除 RB5 的有前途的吸附剂材料。
